Material excavating, loading, transporting, and placing machine



E. R. BARRETT MATERIAL EXCAVATING, LOADING, TRANSPORTINGVAND PLACING MACHINE.

Jul 22, 1941.

Filed on. 1, 493 s '5 Sheets-Sheet; 1

INVENTOR Jul 22, 1941.

E. R. BARRETT MATERIAL EXCAVATING, LOADING, TRANSPORTING. AND PLACING MACHINE Filed 001;. l, 1938- 5 Sheets-Sheet 2 INVENTOR rd R Barr-e22 Q M. A TTORNEYS.

BY E47 y 1941- E. R. BARRETT 2,250,289

MATERIAL EXCAVATING, LOADING, TRANSPORTING. AND PLACING MACHINE Filed Oct. 1, 1938 5 Sheets-Sheet s7 TORNE K9.

y 22, 1941- E. R. BARRE'f-r 2,250,289

MATERIAL ExcAvgrms, LOADING, 'musr'omme. AND rmcme MACHINE Filed m. 1, 1938 5 Sheets-Sheet 4 k494i \I/VVEIVTOR fin/4rd 7T July 22, 1941. A E, R, BARRE T 2,250,289

MATERIAL EXCAVATING, LOADING, TRANSPORTING. AND PLACING MACHINE Filed Oct. 1, 1938 S'Sheets-Sheet 5 INVENTOR Patented July 22, 1941 UNiTED STATES PATENTOFFICE MATERIAL EXCAVATING. LOADING, TRANS- PORTING, AND PLACING MACHINE Edward R. Barrett, Detroit, Mich, assignor to Gar Wood Industries. Inc., Detroit, Mich., a corporation of Michigan Application October 1, 1938, Serial No. 232,702 I v 3 Claims.

and in which the tilting of the scoop for filling,

load hauling, and dumping is by a controlled adjustment about its supporting connection with the main frame.

The main objects of this invention are to provide a material excavating and transporting structure which will have a substantially greater capacity than heretofore; to provide a single bowl structure having a plurality of scraping blades so arranged that scraping and loading may take place successively at a plurality of points longitudinally of the receptacle; to provide a structure of greatly increased strength and rigidity than heretofore; to provide a structure in which the side wings are tied together by a hollow beam structure which serves as a mounting for one of the scraper blades, a bafie for facilitating the loading of material into the scoop, and as a strengthening member for resisting the stresses and strains to which a masubstantially along the line 3-3 of Fig. 2, look ing in the direction indicated by the arrows;

Fig. 4 is an enlarged cross-sectional view illustrating the structure included in the broken circle 4 of Fig. 2;

Fig. 5 is a fragmentary, enlarged top plan view' showing parts in cross-section taken substanv tially along the line 5-5 of Fig. 2, looking in the direction indicated by the arrows;

Fig. 6 is a fragmentary, cross-sectional view taken substantially along the line 66 of Fig. 2, looking in the direction indicated by the arrows;

Fig. '7 is a fragmentary cross-sectional view showing parts in elevation, taken substantially along the line l! of Fig. 2;

Figs. 8 and 9 are side elevational views illustrating the parts in various positions of adjustment for performing the digging or excavating functions of the structure.

Fig. 10 is a side elevational view illustrating the position of-the partsof the apparatus in dumping or unloading position;

Fig. 11 is an enlarged fragmentary top plan view of one side of the machine showing the details of construction, particularly of mounting th gate.

Fig. 12 is an enlarged fragmentary sectional view taken along the line l2-|2 of Fig. 2, looking in the direction indicated by the arrows.

chine of this character is necessarily subjected.

A further object of the present invention is to provide an improved resilient connection between the scraper structure and the power means, such as a tractor, to which the scraper is attached so as to decrease the effect of shock on 'the machine parts, particularly when the digging blade encounters obstructions, such as rocks, and the like.

Other objects of the present invention will become apparent from the following specification, the drawings relating thereto, and from the claims hereinafter set forth.

In the drawings, in which likenumerals are used to designate ,like parts in the several views throughout:

Figure 1 is a top plan view of a load hauling excavating machine embodying features of the present inventioni Fig. 2 is a side elevational'view, with parts broken away showing parts in cross-section, of the structure illustrated in Fig. 1;

Fig. 3 is a fragmentary sectional view take Fig. 13 is an enlarged view, partly in section and partly in elevation, of one of the spring units which aid in the support and movement of the front end of the structure.

Referring'to the drawings, the main frame structure comprises longitudinal, opposite side beams I 0 and I2 rigidly joined at their forward ends by a tubular cross beam l4, and joined adjacent their rear ends by a cross beam l6. Two

' sets of paired truck wheels l8 and 20 are mounted cross axle 34. A draw-bar 36, having a rear-.

wardly directed yoke portion, is attached to the axle 34 for connection with a tractor or the like;

,As shown particularly in Fig. 3, the draw-bar 36 is so constructed as to provide a resilient or shock absorbing connection between the scraper and a tractor to which it is attached, and includes a first housing portion 38 and a second is pivoted any 'over the inner end of the draft rod 44 and have interposed therebetween a plurality of metal disc members 44 which are also slidable on the draft rod 44. The resilient disc members 44 and the metal disc members 44 are arranged in alternate relationship to each other and are retained on the draft rod by means of a heavy washer 42 and a nut 44 which is threaded on the tip end of the draft rod 44. The disc members abut against the wall member 42 and are thus limited in their movement in that direction.

Another guide sleeve 54 is fixed within the housing 44 adjacent its forwardmost end and slidably receives therethrough the outer end of the draft rod 44. The exposed end of the draft rod 44 is enlarged and forms a shoulder that abuts against the forward end'of the housing 44 to limit the inward movement of the draft rod. Outward movement of the draft rod 44 longitudinally of the housing members is permitted to the extent of compressibility of the resilient disc members 44. A removable, universal pivotal connection 44 is provided adjacent the forward end of the rod member 44 for removably and pivotally attaching the draw-bar 44 to a tractor, or the like.

. The connection between the main frame and the axle 44 comprises a pair of arms 44 and 42 integrally secured to the upper end of a semicylindrical strut member 4|, a hydraulic cylinder mechanism 44 and resilient connecting means generally designated 44. The strut member 4| is pivotally attached at its lower end by a horizontal pin 44 to a universal knuckle III which e medial part of a pin II. The pin'llisdis datrightanglestothepin" and is mounted at its ends in upright spaced arms of a fitting I4, which is centrally disposed of the axle 44. The fitting 14 includes a vertical king pin I! which is pivotally mounted in a sleeve member I4 fixed to the axle member 44 centrally thereof. A'bushing 15 of bearing materialis interposed between the sleeve 14 and pin 12.

- The arms 44 and "are angled rearwardly from the strut 4| and are pivotally attached by pivot pins 14 and II, respectively, to cars" and 14, respectively, on the cross-beam i4 and are equally spaced at opposite sides of the media point of the beam, thus permittingthese arms to swing in vertical planes only.

. The hydraulic power mechanism 44 is pivotally mounted at its lower end on a cross-pin 44 which the copending application of Jack B. Haile, filed August 10, 1938, Serial Number 224,131, and as;

signed to the assignee of the present invention.

A circular head or cap member 44 is pivoted to the extension 84 by a pin I42. A sleeve member 93 is integrally formed on one end of a collar 94, the other end of which is provided with a similar, oppositely extending, sleeve 45. The collar 94 has a radially extending, annular flange 44 integrally formed thereon, midway of its axial length, which serves as a seat for one end of a helical compression spring 91.

The other end of the spring 41 seats against the underside of the head member 44, and the spring is loosely guided by a sleeve 98 which is welded to the head 94. The outside diameter of' the guide sleeve 44 is slightly less than the inside diameter of the spring convolutions.

A lower circular head member 49 is pivoted to the forwardly extending end of a bracket I03 by a pin I44, and has a concentrically positioned, axially extending, tube I00 rigidly welded thereto, which has sliding, telescoping fit within the sleeve 45. The head member 94 also serves as a seat for the lower end of a helical compression spring "I, the upper end of which seats against the underside of the flange 44. The'springs 41 and III are of such strength and construction that they will support the machine when fully loaded. as will be hereinafter more fully explained.

By the application of a hydraulic medium to the mechanism 44, the piston rod 42 is extended from its retracted position, as shown in Fig. 9, to its extended position, as shown in Fig. 10. The strut 4| is thus swung from a rearwardly inclined position, as shown in Figs. 8'and 9, to a substantially vertical position, as shown in Fig. 10, to thereby elevate the forward end of the main frame.

The main body portion of the-scraper includes a generally box-like scraping and carrying receptacle forming an intermediate section, a rear section, and a forward part. The intermediate section includes side wall'members 4 which are fixed to the side beams l4 and if by means of angle members III which extend longitudinally ofthe side beam members for a portion of their lengths. A front wall member 4 interconnects the sides ||4 adjacent the forward ends thereof and the rear end of the intermediate section is left open. The rear edges of the side members III are shaped, as indicated by the dotted lines 4, to provide a forwardly extendingrecess l|4lneach of thesides.

A transversely extending bottom member III is disposed between and rigidly ties together the side wall members I intermediatethe ends thereof. A transversely extending baille-member I2! is fixed to the top of the bottom member I24 and also connected to the side walls ,4 by upwardly and outwardly inclined plate members III, and has a substantially smooth upwardly and rearwardly inclined forward wall portion. The rear wall portion of the baffle member I22 slopes downwardly and rearwardly towards and is attached to the bottom member I44, thus forming a closed box section of substantially triangular cross section of great strength. A transversely' extending scraper blade H4 is fixed to the forward leading edge of the baffle lil'adjacent the bottom thereof and is designed for the grading or scraping operation.

The adjustment of this blade relative to the ground is effected by the elevating and lowering structlon, are shown and described in detail in of the main frame by actuation of the hydraulic over the smooth, rearwardly inclined surface of w the baflie I22and be disposed within thereceptacle'to the rear of the baflle. upwardly and rearwardly inclined, smooth baiiie.

By the use of this the capacity of the scraper is materially increased because in prior structures the capacity of such scrapers has been limited by the maximum angle which dirt, being forced upwardly over the outer surface of another pile of dirt, will assume. This angle is materially smaller than the angle of the inclined baiile I22, so that with the baflie I22 the capacity of the receptacle is materially increased.

The rear section of the receptacle is in the form of a scoop I28 which is of box-like form and which is suspended within the rearwardpart of the main frame. The scoop I28 comprises a bottom wall I38 having a plate member I32 disposed on the inner face thereof. The plate member I32 is upwardly and rearwardly inclined adjacent the leading lower edge of the bottom wall I38, and is downwardly and rearwardly inclined towards the rear of the scoop. This shape increases the capacity of the scoop in the same manner as the baflle I22 previously described. The scoop I28 also includes opposite side walls I29 and a back wall I3I leaving the scoop open at its forward end. The side walls I29 of the scoop overlap the side walls I I8 to provide a communicating receptacle. The scoop I28 is suspended by means of pivot pins I34 which extend through the recesses I I8 and are mounted, at their outer ends, in the side beams I8 and I2 at opposite sides of the scoop. The inner ends of the pins I34 are fixed in reinforcing plates I35 which are welded to the inner side of the walls H8 and H2. As mentioned above, the scoop opens forwardly and has fixed to' its leading lower edge a grading or scraping blade I38.'

The tilting of the scoop I28, for scraping or grading and for dumping its load, is under the control of a pair of hydraulic power cylinders I48 mounted longitudinally of the side beams I8 and I2 at opposite sides of the scoop. Each cylinder is pivotally mounted at its rear end by means of a pivot pin I42 to a bracket I44, which is fixed to its underlying side beam. The forward ends of the cylinders have piston rods I48 extending therefrom which are pivotally attached by pins I48 to brackets I58 fixed to opposite side walls I29 of the scoop at points substantially above the sup-.

porting pivots I34. Thus, by extending and retracting the piston rods, the scoop may be caused to pivot about the pivot pins I34 for adjustment to various positions, that is, for loading position, carrying position, and dumping position.

For closing the opening in the bottom forwardly of the scraper I24, an upwardly swinging gate I54 is provided. This gate is received between the side walls H8 and H2 adjacent the forward ends thereof. The gate I54 .is pivotally mounted by means of rearwardly extending arms I55 at each side thereof, each of which is pivotally attached to its adjacent side wall H8 or II2 by means of pivot pins I58. The pins I58 also pass through the reinforcing plates I35, which add strength and rigidity to the side walls I I8 and I I2.

For raising the end gate I54 by pivoting it about the pivot pins I58, a link I58 is pivotally attached by pivot pin I52 to a bracket I54 fixed to the gate member I54 at substantially its transverse center. The link I58 extends upwardly within the receptacle and is pivotally attached by means of a pivot pin I54 to the lower rear end of over the baiiie member into the rear of the re- 'able to permit closing of the gate by gravity, thenthe link I58 may be provided with several links of chain or it may be a cable. The lever I55 is pivoted at I88 to a bracket I59 which in turn is fixed to the cross-member I4 at substantially its" longitudinal midpoint. The rear lower edge ofthe gate is thus adapted to swing from and against the blade I24 as the gate I54 is swung about its pivots I58.

For actuating the gate between open and closed positions, there is provided an hydraulic cylinder I18 which is pivotally mounted at its for-- ward end by a pivot pin I12 to the forward end of the extension 85. The cylinder I18 has the usual piston rod I14 extending rearwardly therefrom move to its open position by pivoting aboutthe' pivot pins I58. I

For a suitable control system for the hydraulic mechanisms disclosed, reference may be had us the patent to Barrett No. 2,203,939 in which'theessential features of the control mechanism necessary for operating the hydraulic mechanisms disclosed in the present application are described in detail. By the structure above described a uni tary receptacle is provided which is adapted to scrape at a plurality of points along its length, preferably in succession. This is accomplished by control of the hydraulic medium to the various cylinders so as to position the various parts of the mechanism for scrapping and/or transportation.

Referring to Figs. 8 to 18, the parts are illustrated in their various positions. In Fig. 8 the front end of the main frame is slightly raised by control of the hydraulic medium to the hydraulic mechanism 54 so that the cutting blade I24 is slightly raised above the ground level. The hydraulic mechanism I48 is actuated so as to pivot the scoop I28 so that the cutting blade I35 is in scraping position. As the scraper'is drawn over the ground while the parts are in this position, the scraped dirt is caused to pass into the receptacle I28 over thescraping blade I 35. when the scoop I38 has been substantially filled, it is pivotally rotated to its initial position by the hydraulic mechanism I48, as shown in Fig. 9, in which position the scraper blade I35 abuts against the rear lower edge of the transverse bailie member I22, thus'closing the opening therebetween.

In Fig. 9, theparts are in such position that the forward end of the main frame is in its lowermost position. The scraping blade I24 is then in scraping position and as the receptacle is drawn over the ground, the blade I24 scrapes up the dirt which passes into the receptacle, upwardly, over the smooth, rearwardly inclined baflie member I22. The dirt is caused to pass ceptacle until the rear thereof is filled, and when the entire scraper is filled, the gate I54 may be actuated by the hydraulic mechanism I18 to close the opening adjacent the scraper I24, or it may be allowed to close by g'ravity- At the same time, the hydraulic mechanism is actuated to raise the forward end of the frame to the position shown in Fig, 10. The scraper may then be transported to a dumping location; and by then pivoting the gate it and the scoop its to the positions illustrated in Fig. 10, the load carried by the scraper may be dumped therefrom.

Formal changes may be made in the specific embodiment of the invention described without departing from the spirit and substance oi the invention, the scope of which is commensurate with the appended claims.

What is claimed is:

i. A scraper structure comprising a rigid imme, means forming a transporting receptacle fixed to said frame, said means including a main body portion fixed with respect to said frame, a scoop plvotally mounted relative to the body portion at the rear thereof, and a swinging gate pivotaliy mounted relative to the body portion adjacent the front thereof, a transversely extending scraper element fixed to said scoop along the leading lower edge thereof, another transversely extending scraper element fixed to the main body portion adjacent the lower edge of said gate, and an upwardly and rearwardly inclined bafile member within the main body portion adjacent the bottom thereof extending transversely of said body portion immediately to the rear of said last named scraper element.

' 2. A scraper structure including side frames,

side walls fixed to said side frames, a scoop pivotally mounted between said side frames, as scraper blade mounted on the forward leading edge of said scoop, a transverse member having an upwardly and rearwardly sloping front surface and a downwardly sloping rear surface fixed at its ends to and extending between said side walls forwardly of said scoop, a scraper blade mounted on the forward leading edge of said transverse member, said scoop scraper blade cooperating with the rear edge of said transverse member to retain material within said scoop, and a swinging gate cooperating with said transverse member scraper blade to retain material in said scoop.

3. A scraper structure comprising a rigid frame, means forming a transporting receptacle fixed to said frame, said means including a main body portion fixed with respect to said frame, a scoop pivotally mounted relative to the body portion at the rear thereof and a swin in gate pivotally mounted relative to the body portion adjacent the front thereof, a transversely extending scraper element fixed to said scoop along the leadin lower edge thereof, another transversely exte ding scraper element fixed to the main body portion adjacent the lower edge of said gate, and an upwardly and rearwardly inclined baflie member within the main body portion adjacent thereof, extending transversely of the main body portion immediately to the rear of said last named scraper element, said bafiie member being inclined at a greater angle with the horizontal than the angle of said last named scraper element.

EDWARD R. BARRETT. 

